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Palladium-catalyzed tandem cyclization of allenyl-aldehydes and -ketones with aryl iodides and Bu3SnSnBu3. | LitMetric
[reaction: see text] The arylative cyclization of allenyl-aldehydes with aryl iodides and hexa-n-butyldistannane to form substituted cyclopentanols and cyclohexanols by tandem palladium-catalyzed carbostannylation and allylation was achieved under mild conditions.
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Highly stereoselective alkylative and arylative cyclization reactions of allenyl-aldehydes and -ketones with organozinc reagents occur efficiently in the presence of catalytic Ni(COD)2 to afford cis-fused homoallylic cyclopentanols.
The direct cyclization of allenyl aldehydes with organozincs in the presence of Ni(COD)(2) provides synthetically versatile homoallylic alcohols. Both monosubstituted and 1,3-disubstituted allenes participate in the process, with the latter allowing preparation of stereochemically defined trisubstituted alkenes. [reaction: see text]
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